The elephant never forgets; piloting a chlamydia and gonorrhea retesting reminder postcard in an STD clinic setting.

We examined the number and proportion of persons retesting and reinfected with Chlamydia and/or gonorrhea 3 to 4 months after initial infection in one New York City sexually transmitted disease clinic using a reminder postcard compared to clinics not using this reminder. Retesting increased; however, the proportion reinfected was lower during the intervention.